Hi Bob and Jean-François,

Im currently working on the design of something similar.

(Control, Monitor and Alarm system)

There will be:
a number of motors for sun blinds and shutters to be controlled.
input from a number of buttons, sunlight and windspeed sensors.
a number of PIR detectors.

In total I will have to deal with 80+ I/O lines.

I'm currently as far as identifying components to be used.

Wouldn't this be something for a joint project?

regards

Ralph

P.S.

Bob, the answer to your question:
What's the best way to communicate?
is:
use this Forum! ;-)